Carbureter.



n STATES PATENT oFrroE.

PERCIVAL S. TIGE, 015 DETROIT, MICHIGAN.

CARBURETER.

To all whom it may concern:

Be it known that I, PnRorvAL S. Tron, a citizen of the United States, residing at Detroit, county of Vyayne, State of lllichigan,

'have invented a certain new and useful Improvement in Carbureters, and declare the following to be. a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to carbureters and has-for its object to provide an improved apparatus to supply the proper quantity of liquid fuel to the intake of a gas engine at the different speeds of said engine. 1 secure this object in the device illustrated in the accompanying drawing in which the figure is a section.

a is the passage with which the intake passage to the engine will be connected.

I) is the pipe for supplying fuel to the liquid fuel reservoir 0; There is provided a constant level apparatus in the reservoir 0.

Specification of Letters Patent.

Patented Jan. 5, 1915 Application filed-January 8,1914. Serial No. 810,919.

tween the outer wall of the tube It and the inner wallof the tube is.

The operation of the above described device is as follows: When the throttle is ap-' proximately closed a considerable vacuum is drawn in the passage a and chamber 7' and the pressure in the reservoir 0 is equalized with that in the chamber 9' through the passage d. Now there is little flow of air through the constriction of the'tube p and therefore there is but little suction effect 0 is the inlet passage to the carbureter in a which is located the throttle valve n.

p, is a strangling tube located in the passage a and actingto form a constriction in said .passage.

j, is a chamber between the passage 0 and the entrance to the tube p.

d is an equalizing air passage connecting the chamber 7' with the reservoir c above the 'level of the liquid in the latter.

limit the amount of liquid that may pass from the reservoir to the delivery nozzle;

k is atube opening at m, at the mouth of the strangling tube p, to form the delivery nozzle for the liquid fuel. The passage 9 communicates with the interior of the tube It so as to supply liquid .fuel to the latter.

7:. is a tube of smaller diameter than the tube is and located therein, with its upper end opening just below the upper end of the tube and there is a lower end opening to the outer air. An annular delivery orifice is thus formed adjacent to the upper end of the tube k. There-is an annular passage be- 1 due to the increase of velocity of air at this polnt.

great velocity and the aspirating effect of this current of air draws the liquid fuel up through the tube It and sprays it into the current of air passing to the engine. As the throttle valve is opened the vacuum in the chamber 9' diminishes and the suction effect But on the other hand the air is drawn through the bore of the tube It with in the constriction of the tube p increases so that by the latter theliquid will be drawn through the tube 70 while there will still be a current of air drawn through the bore of the tube It suflicient to spray the fuel delivered from the tube k.

The opening through the tube 7 is so proportioned that it shall permit the largest quantity of fuel required to flow, that is to say, the quantity required at the full speed of the engine. The tubes 70 and h are designed to deliver the smallest .quantity of fuel required-that is to say, at the idling or closed position of the throttle valve. These two adjustments being made th'e'intermediate adjustments will be automatic and accurate. By turning the tube 72. its up-' per end is adjusted longitudinally of the tube is so' that the relative positions of the upper ends .of said tubes may be adjusted. It has been found that a better action is secured by placing the air tube within the fuel delivery tube. Tubes f having different sized apertures maybe provided and that one used best adapted to the particular re-. quirements.

What I claim is:

1.' In a carbureter, an air passage constricted at one portion thereof, a delivery tube for liquid fuel terminating in said constricted portion, a throttle valve between the delivery end of said tube and the entrance to said air passage, a passage communicating with the outer air extending into said air passage and terminating atthe constricted portion thereof in a position to produce an aspirating effect on said deliverytube,. a closed reservoir for liquid fuel communicating with and adapted to supply said delivery tube, and an equalizing air passage communicating With the air space at the top of said-reservoir and With said air passage betWeen the'constricte'd portion thereof and the throttle valve.

2. In a. carbureter, an air passage constricted at one portion thereof, 'a' delivery tube for liquid fuel terminating in said constriated portion, a throttle valve between the delivery end of said tube and the entrance to said air passage, a passagev communicating with the outer air extending into said air passage and terminating at the constricted portion thereof in a position to'produce an aspirating-effect on said delivery tube, a closed reservoir for liquid fuel communicating with and adapted to supply said PERCIVAL S. TIOE.

Witnesses:

AGNES M. HIPKINS, ELLIOTT J. STODDARD'. 

